scot-free

(adverb) without punishment or suffering

Example Sentences:

A: Did you get in trouble for starting that fire?
B: Nope! I got off scott-free!

The bank robber escaped scott-free when the police couldn’t find him.

From the Blogs:

The Office recap: Scott free

Similar idioms:

1. slap on the wrist
2. take off
3. fight fire with fire
4. speed off
5. get along like a house on fire